How do you catch the limited time only holiday — Santa-hat! — Pikachu and Raichu in Pokémon Go? Like this!Pokémon Go has a special, limited edition treat for players around the world — a holiday Pikachu you can only catch between December 12 and December 29, 2016 January 3, 2016 now! In countries where Christmas is popular, that holiday Pikachu is wearing a Santa hat. Cooler still, you can evolve him into Raichu. And. Keep. The. Hat! Here's how!Note: Thanks to Pokémon Go's holiday event, SANTACHU — the Santa hatted Pikachu! — is currently spawning more than every before, but you still need to know how to catch him!